Ralf Zapf

2.4k total citations
64 papers, 1.9k citations indexed

About

Ralf Zapf is a scholar working on Materials Chemistry, Catalysis and Mechanical Engineering. According to data from OpenAlex, Ralf Zapf has authored 64 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 55 papers in Materials Chemistry, 42 papers in Catalysis and 17 papers in Mechanical Engineering. Recurrent topics in Ralf Zapf's work include Catalytic Processes in Materials Science (51 papers), Catalysts for Methane Reforming (34 papers) and Catalysis and Oxidation Reactions (26 papers). Ralf Zapf is often cited by papers focused on Catalytic Processes in Materials Science (51 papers), Catalysts for Methane Reforming (34 papers) and Catalysis and Oxidation Reactions (26 papers). Ralf Zapf collaborates with scholars based in Germany, Netherlands and Spain. Ralf Zapf's co-authors include Gunther Kolb, Volker Hessel, Helmut Pennemann, Yong Men, Asterios Gavriilidis, Holger Löwe, Martin Wichert, Athanassios Ziogas, Hubert Gnaser and Martin O’Connell and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of Power Sources and Applied Catalysis B: Environmental.

In The Last Decade

Ralf Zapf

62 papers receiving 1.9k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ralf Zapf Germany 25 1.4k 1.2k 544 542 366 64 1.9k
Ali Akbar Mirzaei Iran 28 1.7k 1.3× 1.9k 1.5× 715 1.3× 785 1.4× 237 0.6× 119 2.3k
Rune Lødeng Norway 21 1.7k 1.2× 1.5k 1.2× 714 1.3× 527 1.0× 208 0.6× 32 2.2k
Hongfang Ma China 28 1.5k 1.1× 1.4k 1.1× 698 1.3× 476 0.9× 231 0.6× 120 2.3k
Jae‐Soon Choi United States 26 1.3k 0.9× 932 0.8× 753 1.4× 254 0.5× 200 0.5× 50 1.6k
Jun Lin China 18 905 0.7× 899 0.7× 642 1.2× 306 0.6× 379 1.0× 59 1.7k
V. D. Belyaev Russia 24 1.6k 1.1× 1.3k 1.1× 390 0.7× 173 0.3× 364 1.0× 97 1.9k
G. G. Kuvshinov Russia 21 1.4k 1.0× 874 0.7× 323 0.6× 260 0.5× 147 0.4× 43 1.7k
Anwu Li Canada 17 1.0k 0.7× 1.2k 1.0× 619 1.1× 480 0.9× 277 0.8× 33 1.6k
Concepción Herrera Spain 22 1.3k 1.0× 1.2k 1.0× 570 1.0× 381 0.7× 233 0.6× 60 1.7k
Jaeha Lee South Korea 26 1.6k 1.2× 1.2k 1.0× 631 1.2× 136 0.3× 352 1.0× 52 1.8k

Countries citing papers authored by Ralf Zapf

Since Specialization
Citations

This map shows the geographic impact of Ralf Zapf's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ralf Zapf with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ralf Zapf more than expected).

Fields of papers citing papers by Ralf Zapf

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ralf Zapf. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ralf Zapf. The network helps show where Ralf Zapf may publish in the future.

Co-authorship network of co-authors of Ralf Zapf

This figure shows the co-authorship network connecting the top 25 collaborators of Ralf Zapf. A scholar is included among the top collaborators of Ralf Zapf based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ralf Zapf. Ralf Zapf is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Weißenberger, Tobias, Ralf Zapf, Helmut Pennemann, & Gunther Kolb. (2025). Effect of the Catalyst Support on the NOX Formation During Combustion of NH3 SOFC Off-Gas. Catalysts. 15(3). 196–196.
2.
Weißenberger, Tobias, Ralf Zapf, Helmut Pennemann, & Gunther Kolb. (2024). Catalyst Coatings for Ammonia Decomposition in Microchannels at High Temperature and Elevated Pressure for Use in Decentralized and Mobile Hydrogen Generation. Catalysts. 14(2). 104–104. 3 indexed citations
3.
Engelbrecht, Nicolaas, Raymond C. Everson, Phillimon Modisha, et al.. (2023). Experimental Evaluation of a Coated Foam Catalytic Reactor for the Direct CO2-to-Methanol Synthesis Process. ChemEngineering. 7(2). 16–16. 1 indexed citations
4.
5.
Zapf, Ralf, et al.. (2019). Hydrogen production over highly active Pt based catalyst coatings by steam reforming of methanol: Effect of support and co-support. International Journal of Hydrogen Energy. 45(3). 1658–1670. 79 indexed citations
6.
Fabry, David C., Yee Ann Ho, Ralf Zapf, et al.. (2017). Blue light mediated C–H arylation of heteroarenes using TiO2as an immobilized photocatalyst in a continuous-flow microreactor. Green Chemistry. 19(8). 1911–1918. 58 indexed citations
7.
Barbosa, Roland, Vasiliki Papaefthimiou, Detre Teschner, et al.. (2013). Methanol Steam Reforming over Indium-Promoted Pt/Al2O3Catalyst: Nature of the Active Surface. The Journal of Physical Chemistry C. 117(12). 6143–6150. 38 indexed citations
8.
9.
Kolb, Gunther, et al.. (2011). Development of Microstructured Catalytic Wall Reactors for Hydrogen Production by Methanol Steam Reforming over Novel Pt/in2o3/al2o3 Catalysts. Chemical engineering transactions. 24. 133–138. 13 indexed citations
10.
Baier, Tobias, et al.. (2008). Kinetic study of CO preferential oxidation over Pt–Rh/γ-Al2O3 catalyst in a micro-structured recycle reactor. Catalysis Today. 145(1-2). 90–100. 21 indexed citations
11.
Iglesia, Óscar de la, Víctor Sebastián, Reyes Mallada, et al.. (2007). Preparation of Pt/ZSM-5 films on stainless steel microreactors. Catalysis Today. 125(1-2). 2–10. 40 indexed citations
12.
Guan, Guoqing, Ralf Zapf, Gunther Kolb, et al.. (2006). Low temperature catalytic combustion of propane over Pt-based catalyst with inverse opal microstructure in a microchannel reactor. Chemical Communications. 260–262. 24 indexed citations
13.
Zapf, Ralf, Gunther Kolb, Helmut Pennemann, & Volker Hessel. (2006). Basic Study of Adhesion of Several Alumina‐based Washcoats Deposited on Stainless Steel Microchannels. Chemical Engineering & Technology. 29(12). 1509–1512. 36 indexed citations
14.
Kolb, Gunther, Volker Hessel, V. Cominos, et al.. (2006). Microstructured Fuel Processors for Fuel-Cell Applications. Journal of Materials Engineering and Performance. 15(4). 389–393. 18 indexed citations
15.
Kolb, Gunther, Helmut Pennemann, & Ralf Zapf. (2005). Water-gas shift reaction in micro-channels—Results from catalyst screening and optimisation. Catalysis Today. 110(1-2). 121–131. 34 indexed citations
16.
Gnaser, Hubert, Wolfgang Böck, Yong Men, et al.. (2004). Secondary-ion mass spectrometry (SIMS) analysis of catalyst coatings used in microreactors. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 219-220. 880–885. 6 indexed citations
17.
Zapf, Ralf, et al.. (2004). Nanoporöse Katalysatorschichten für Anwendungen im Mikroreaktor. Chemie Ingenieur Technik. 76(5). 513–514. 3 indexed citations
18.
Gavriilidis, Asterios, et al.. (2004). Experimental studies of nitrobenzene hydrogenation in a microstructured falling film reactor. Chemical Engineering Science. 59(16). 3491–3494. 77 indexed citations
19.
Cominos, V., Volker Hessel, Christian A. Hofmann, et al.. (2003). Fuel processing in micro-reactors for low power fuel cell applications. TU/e Research Portal. 1 indexed citations
20.
Gavriilidis, Asterios, et al.. (2003). Catalyst preparation and deactivation issues for nitrobenzene hydrogenation in a microstructured falling film reactor. Catalysis Today. 81(4). 641–651. 113 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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